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Proceedings Paper

Photo-isomerization induced rapid photodegradation of optical nonlinearity in cyano substituted stilbene derivative doped poled polymer
Author(s): Liyong Ji; Liying Liu; Mingxin Ye; Lei Xu; Wencheng Wang
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Paper Abstract

Although it is expected that, the C=C bond strength will increase after introducing the cyano side-group, thus its photo-stability should be improved. But after careful study, we found that when exposed to light, the introduction of cyano group makes the new molecule alpha'-cyano-4'-nitro-4-N, N-dimethylaminostilbene (CNDS) to isomerize much easier than 4'-N,N-dimethylamino-nitrostilbene DANS. SHG, FTIR, UV-visible absorption and optical pump induced anisotropic absorption measurements were done to support our conclusions. Careful study of the photoinduced optical anisotropy(POA) shows that the isomerization of CNDS is a little smaller than the azo-dye molecule dimethylamino-nitroazobenzene (DMANAB). Explanation was given based on trans-cis quantum yields, de-planar molecular structure which induces small order of orientation and slower thermal relaxation.

Paper Details

Date Published: 28 January 2005
PDF: 6 pages
Proc. SPIE 5646, Nonlinear Optical Phenomena and Applications, (28 January 2005); doi: 10.1117/12.576781
Show Author Affiliations
Liyong Ji, Fudan Univ. (China)
Liying Liu, Fudan Univ. (China)
Mingxin Ye, Fudan Univ. (China)
Lei Xu, Fudan Univ. (China)
Wencheng Wang, Fudan Univ. (China)


Published in SPIE Proceedings Vol. 5646:
Nonlinear Optical Phenomena and Applications
Qihuang Gong; Yiping Cui; Roger A. Lessard, Editor(s)

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